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Introduction to SQL

Introduction to SQL
Indexes can usually be created for both primary and secondary keys.

True
False

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Introduction to SQL
The Microsoft Access wildcards are ____ and ____ .

percent sign (%); underscore (_)
asterisk (*); percent sign (%)
question mark (?); asterisk (*)
underscore(_); question mark (?)

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Introduction to SQL
Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000?

SELECT name FROM staffinfo WHERE salary IN (10000, 25000);
None of these
Both A and B
SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;

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Introduction to SQL
The FROM SQL clause is used to...

specify what table we are selecting or deleting data FROM
specify range for search condition
None of these
specify search condition

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Introduction to SQL
Microsoft Access has become ubiquitous, and being able to program in Access is a critical skill.

False
True

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Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

True
False

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